user_list = ["苍老师","有坂深雪","大桥未久"]
user_list.insert(0,"马蓉")
user_list.insert(2,"李小璐")
print(user_list)





info = { "age":12,  "status":True,"name":"武沛齐" }
v1 = "age" in info
print(v1)

v2 = "age" in info.keys()
print(v2)

if "age" in info:
    pass
else:
    pass